multiprocess.js
3.68 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
"use strict";
var log4js = require('../log4js')
, net = require('net')
, END_MSG = '__LOG4JS__';
/**
* Creates a server, listening on config.loggerPort, config.loggerHost.
* Output goes to config.actualAppender (config.appender is used to
* set up that appender).
*/
function logServer(config) {
/**
* Takes a utf-8 string, returns an object with
* the correct log properties.
*/
function deserializeLoggingEvent(clientSocket, msg) {
var loggingEvent;
try {
loggingEvent = JSON.parse(msg);
loggingEvent.startTime = new Date(loggingEvent.startTime);
loggingEvent.level = log4js.levels.toLevel(loggingEvent.level.levelStr);
} catch (e) {
// JSON.parse failed, just log the contents probably a naughty.
loggingEvent = {
startTime: new Date(),
categoryName: 'log4js',
level: log4js.levels.ERROR,
data: [ 'Unable to parse log:', msg ]
};
}
loggingEvent.remoteAddress = clientSocket.remoteAddress;
loggingEvent.remotePort = clientSocket.remotePort;
return loggingEvent;
}
var actualAppender = config.actualAppender,
server = net.createServer(function serverCreated(clientSocket) {
clientSocket.setEncoding('utf8');
var logMessage = '';
function logTheMessage(msg) {
if (logMessage.length > 0) {
actualAppender(deserializeLoggingEvent(clientSocket, msg));
}
}
function chunkReceived(chunk) {
var event;
logMessage += chunk || '';
if (logMessage.indexOf(END_MSG) > -1) {
event = logMessage.substring(0, logMessage.indexOf(END_MSG));
logTheMessage(event);
logMessage = logMessage.substring(event.length + END_MSG.length) || '';
//check for more, maybe it was a big chunk
chunkReceived();
}
}
clientSocket.on('data', chunkReceived);
clientSocket.on('end', chunkReceived);
});
server.listen(config.loggerPort || 5000, config.loggerHost || 'localhost');
return actualAppender;
}
function workerAppender(config) {
var canWrite = false,
buffer = [],
socket;
createSocket();
function createSocket() {
socket = net.createConnection(config.loggerPort || 5000, config.loggerHost || 'localhost');
socket.on('connect', function() {
emptyBuffer();
canWrite = true;
});
socket.on('timeout', socket.end.bind(socket));
//don't bother listening for 'error', 'close' gets called after that anyway
socket.on('close', createSocket);
}
function emptyBuffer() {
var evt;
while ((evt = buffer.shift())) {
write(evt);
}
}
function write(loggingEvent) {
// JSON.stringify(new Error('test')) returns {}, which is not really useful for us.
// The following allows us to serialize errors correctly.
// Validate that we really are in this case
if (loggingEvent && loggingEvent.stack && JSON.stringify(loggingEvent) === '{}') {
loggingEvent = {stack : loggingEvent.stack};
}
socket.write(JSON.stringify(loggingEvent), 'utf8');
socket.write(END_MSG, 'utf8');
}
return function log(loggingEvent) {
if (canWrite) {
write(loggingEvent);
} else {
buffer.push(loggingEvent);
}
};
}
function createAppender(config) {
if (config.mode === 'master') {
return logServer(config);
} else {
return workerAppender(config);
}
}
function configure(config, options) {
var actualAppender;
if (config.appender && config.mode === 'master') {
log4js.loadAppender(config.appender.type);
actualAppender = log4js.appenderMakers[config.appender.type](config.appender, options);
config.actualAppender = actualAppender;
}
return createAppender(config);
}
exports.appender = createAppender;
exports.configure = configure;